I think Tek stopped developing RSAVu about 2010 and now they have another program:
SignalVu-PC is the foundation of RF and vector signal analysis software that helps you easily validate RF designs. It is based on the signal analysis
engine of the RSA5000 Series real-time signal analyzers and runs on your computer or Windows tablet. You can now move your analysis of
acquisitions off the instrument and anywhere.
Analyzes waveforms acquired by Tektronix real-time signal analyzers and oscilloscopes, including:
Tektronix real-time signal analyzers (RSA3000, RSA5000, RSA6000, SPECMON Series, RSA500, RSA600, and RSA306 Series)